Improved kefeigekating milk-can



@auch tstm sttmtt @ffice- Wnn'nnu W. Wnrrn AND MARTIN KING, 0F LoWvIL'Ln, NEW YORK.

Letters Patent No. 78,777, datedJzme 9, 1868.

IMPROVE) RBFRIGERATING MILK-GAN.

Bc it known that wc, W.\nRE-N W. WHITE and MARTIN KING, both ofthe town of Lowville, county of Lewis, and Stato of New York, have invented a new and improved Milk-Can and we hereby declare that the following is a full and exact description thereo`,,rcference being had to the accompanying drawings, a-'nd the letters of reference marked thereon, makinga partof this specifica-tion, in 'whichl Figure 1 is a perspective view. l

Figure 2, a half plan of top and bottom.

Figure 3, a section, answering to either, longitudinal or transverse.

The general character of our invention consists in providing amilk-can for the use of farmers and others in carrying wtheir milk to cheese-factories, which milk-canV shall produce and maintain a. temperature ofthe' milk sufliciently lower than the naftu'ral and ordinary temperature thereof, so that thereby the frequent souring,'so prevalent with the ordinary milk-can, will be prevented. i

In the accompanying drawings, the volume of the cooling-liquid is designed to be about equal to the volume of milk to be cooled down. K i

To enable'otlers to construct and use our invention, we wil-l proceed to describe its-construction and operation.

We constructy a vessel of any desired form and capacity, making the inside, or surface in connection with the milk, of tin of suitable strength.

In the illustration accompanying this specification, the vessel is a cylinder. Call it the milk-chamber A A A. Around this chamber is another one, B B B, which may be of tin, iron, or wood. This outerwylinder is concentrically fas-tened tothe-inner chamber by the annular top, C C, and' the bottoms of both vessels are also secured to each other. I v

This construction gives us a water-tight jacket or chamber, B A B A, around the milk-chamber, and into which the cooling-medium is passed by the funnel-pipe F. v ,l

In the side of the milk-chamber, near the bottom, there is an aperture, to which the elbow E is secured, and this elbow E connects with an upright cylinder, D, rising from the bottom 0F the milk-chamber A A A, at its centre. This upright cylinder Dis a little less in height than thc jacket formed by the cylinders B B B and A A A.

It is apparent, thc vertical column D and the cooling-space before referred to will lill up simultaneously.

The lid or cover ofthe milk-chamber is made hollow', (see iig. 3,) sons to hold a portion ofthe cooling-liquid.

This lid H is supplied with an air-escape pipe, J, and a funnel-pipe, I, for filling and emptying the cooling-fluid. l

.On the annular top, C C, of the `jacket, containing the cold liquid, there is a funnel-pipe, F, for the purpose of' filling the jacket, and, as will be perceived, lling at the same time the central cylinder D. On the outside oi' thejacket there is a pipe or faucet, G, from which the cooling-liquid may be run o.

The operation is simple. The can or vessel, except the cover, may, in the first instance, be charged with cooling-liquidV in the placeprovided for it, and the milk, as it comes from thecows, after straining, maybe poured in. It will soon come tol an equilibrium. Then, when ready to start for the factory, run olic the coolingliquid, row elevated to thc temperature of' equilibrium, refill with the cooling-liquid, 'and also fill the cover, and place it over the milk-chamber, and thus a cold surface is presented to the enclosed milk all around and through its centre and on the top. V

Any little elevation of temperature that, in hot weather, would be dueto the caloric absorbed from the atmosphere. will be more than compensated for by charging the can twice with the coolingliqnid, and it is only in extremely hot weather that this twice charging. will be necessary.

What we claim as our invention, and desire to secure by Letters Patent, is

The combination of the jaoketA B and cylinder D,together with the hollowlid H, the Ventilating-tube J', and the connecting-tube E, substantially as specified, and for the'purposes therein set forth.

' WARREN W. WHITE,

MARTIN KING.

Witnesses:

H. Almacena, ABRAM FLINT, Guo. S. CASE. 

